-3x+21=-2x+12

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Solution for -3x+21=-2x+12 equation:


Simplifying
-3x + 21 = -2x + 12

Reorder the terms:
21 + -3x = -2x + 12

Reorder the terms:
21 + -3x = 12 + -2x

Solving
21 + -3x = 12 + -2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '2x' to each side of the equation.
21 + -3x + 2x = 12 + -2x + 2x

Combine like terms: -3x + 2x = -1x
21 + -1x = 12 + -2x + 2x

Combine like terms: -2x + 2x = 0
21 + -1x = 12 + 0
21 + -1x = 12

Add '-21' to each side of the equation.
21 + -21 + -1x = 12 + -21

Combine like terms: 21 + -21 = 0
0 + -1x = 12 + -21
-1x = 12 + -21

Combine like terms: 12 + -21 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9

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